Appliance for taking up or neutralizing shocks.



Patented may I3, |902.

F. H. SCHULE. APPLIANCE FR TAKING UP 0R NEUTRALlZING SHUGKS.

(Application led Jin. 9, 1902.)

(No Model.) i

UNUFEDY STATES kvPATENT EEICE.

FRIEDRICH HERMANN SCHULE, OF HAMBURG, GERMANY.

vAPPLIANCE FOR TAKiNG UP OR NEUTRALIZING SHOCKS.

.SPECIFIGATION forming part of llllettersl Patent No. 700,092, dated May 13, 1902.

Application tiled January 2, 1902. Serial No. 88,215. (No model.)

To (Zliwwntjz't may concern:

Be itknown that I, FRIEDRICH HERMANN SCHULE, va subject ofthe German Emperor,`

ments in 'Appliances for Taking Up or Neu-Y tralizing Shocks 3 and I do hereby declare the following to be a full, clear, and exact description of Vthe invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, vand to letters of Areference marked thereon, which'form a lpart of this specification.

This invention has relation to appliances for taking up or neutralizing the shocks resulting from the reciprocating movements of reciprocating machine elements or machines the function o f which is 4dependent upon their reciprocating motion-as, for instance, reciprocating conveyers, separators, and like machines, and especially those machines which are in practice more or less heavily loaded, as ore and coal separators, the shocks resulting from their reciprocation tending to rapidly injure the machine. On the other hand, in machines for separating lighter materials, and particularly more or less finely divided materials, and-wherein the `separation is effected by causing Amaterials of different specific gravity to move in opposite directions overa smooth imperforate table-a s,

for instance, in a machine such as shown and described in my Letters VPatent ofthe United states dated May 12, 1896,' No. tasifnlese shocks are detrimentaltola rapid andperfect separation, because the impulses given to the materialsof different specific gravity are too violentY and the separation is avery slow andimperfect, so that the material has to be passed through the machine a greater numberof times than would be the casel if these yshocks were neutralized.

In mypending application for Letters Patentzofthe United States/,filed October 2, 1900, Serial No. 31,786, I have shown appliances for neutralizing the shocks referred to comprising, essentially, a frame journaled to the separat'or about midway of its length, a cross-head secured to theconnecting-rod connectedwith a crank on a driving or driven shaft, said cross head having to and fro motion in the frame, cross-head guides and resilient resistances on said guides in the form of springs .acting ,atA different points of the length of the cross-head on opposite sides thereof and antagonizing its to-and-fro motion. Although good results are obtained by these appliances, yet I have found in practice that the crosshead is liable to be injured and even broken at those points acted on by the resilient resistances more remote from the point at which the power is applied-namely, the longitudinal center of said cross-head-when the resistance to itsvrecprocating movements is the same atallpoints, as shown inthe drawings of said application. This liability to injury to the cross-head is materially increased in machines for separating heavy or comparatively heavy substances, such as ores, coal,

and the like. j I have furthermore discovered that a more uniform reciprocating motion is imparted tothe separating-table when the frame is journaled thereto or to the supporting-frame thereof at a point between its longitudinal center and that end farthest from .the driven end of the connecting-rod-. e.,

farthest from the crank-shaft.

The object of this invention lies in means whereby the `above-recited danger of injury -to the cross-head is avoided, and this I attain Thatmy invention may be fully understood, Twill describe the same in-detail, reference being had to the accompanying drawings, in whi'ch I have shown mysaid invention applied to a reciprocating separator such as shown and described in .my 'aforesaid application and patent, though I do not desire lter and the end farthest from the crank-shaft.

IOO

to limit myself to such application, as it may i be applied to other reciprocating machine elements.

In said drawings, Figure l is a side elevation of the separator equipped with my improved appliances for neutralizing shocks, and Fig. 2 is a top plan view of said appliances.

Referring to Fig. l, A indicates the separator proper, the supporting-frame a of which has pivoted thereto toothed sectors s', gearing with rack-bars r, secured to a suitable bed, and F indicates the frame or carrier for the resistances which antagonize the movements of the cross-head, which latter is secured to the connecting-rod R,that connects said crosshead to a crank c on crank-shaft s, driven by any suitable means, as bya belt-pulley P.

Referring now to Fig. 2, the carrier consists of a rectangular frame F, whose end bars are provided with suitable bearings b, in which the connecting-rod R reciprocates freely, and to which rod the cross-head H is secured midway of its length and has free to-and-fro motion in said carrier, whichis provided with journals f on that side of cross-head farthest from the crank-shaft or driven end of the connecting-rod R. To the end bars f of carrier F are secured cross-head guides in the form of rods d, screw-threaded at their ends for the reception of tightening-nuts, said rods passing freely through the cross -head on either side of the connecting-rod R.

On each of the guide-rods d and on opposite sides of the cross-head I-I are mounted the resistances which antagonize the movements of the cross-head with the connectingrod, which resistances are shown in the form of springs, the power of which varies substantially in accordance with the moment on the cross-head at the points of action of said springs. l

The springs S, nearest to the connecting-rod R, exert a given maximum power thereon. The resistancesprings SQ next to springs S, are shorter, consequently weaker, and between them and the cross-head H are interposed elastic cushions B, preferably of rubber of given elasticity, so that the power exerted by said springs S/ on opposite faces of the cross-head is substantially proportionate to the moment on the cross-head at those points during its to-and-fro motion under the action of the connecting-rod R. The resistancesprings S2, farthest from the connecting-rod, are shorter than the springs S', hence weaker than the latter, and correspondingly longer elastic cushions B2 are interposed between them and the opposite faces of the crossheads H on which they act, the difference between the power of springs S2 and that of springs S being substantially in accordance with the increased moment on the cross-head at the points acted on by said springs S2.

In this manner I am enabled to substantially balance the moments on the cross-head at dierent'points.

To avoid too rapid wear of the cushions B/ and B2, I interpose a metal washer w between them and the springs S and S2, respectively.

A similar washer (not shown) may be interposed between each cushion and the crosshead, though this is not absolutely necessary, as there is but little wear at the points of Contact of the cushions with the cross-head.

The operation of the described means for taking up or neutralizing shocks resulting from the reciprocation of a driven and a driving element will be readily understood from what has been said and will need no further description.

Having thus described my invention, what I claim as new therein, and desire to secure by Letters Patent, is-

l. The combination with a body to be reciprocated and an element, as a crank-driven connecting-rod, for reciprocating said body; of means for neutralizing shocks, comprising a carrier journaled tosaid body and mounted loosely on the connecting-rod, and provided with cross-head guides, a cross-head guided thereby and secured to the rod, and yielding resistances acting at different points on said cross-head to antagonize its movements with the connecting-rod, the degree of resistance Varying substantially in accordance with the moment on the cross-head at said'dierent points, for the purpose set forth.

2. The combination with a body to be reciprocated and an element, as a crank-driven connecting-rod, for reciprocating the same; of neans for neutralizing shocks, comprising a carrier in the form of a frame journaled to the aforesaid body, and mounted loosely on said rod, a cross-head secured to the latter, cross-head guides secured to the frame on either side of the connecting-rod, and yielding resistances acting at dierent points on and on opposite sides of said cross-head to antagonize its movements with the connecting-rod, the power exerted on the crosshead by said resistances varying substantially in accordance with the moment on the crosshead at said different points, for the purpose set forth.

3. The combination with a body to be reciprocated and an element, as a crank-driven connecting-rod, for reciprocating the same; of means for neutralizing shocks comprising a carrier loosely mounted on the rod and journaled to the aforesaid body at points intermediate of its longitudinal center and that end farthest from the driven end of the rod, said carrier having cross-head guides, a crosshead secured to the connecting-rod and guided by said guides, and yielding resistances act ing on opposite faces of the cross-head at different -points to antagonize its to-and-fro movements with the connecting rod, the power exerted by said resistances varying substantially in accordance with the moment on said cross-head at the aforesaid diiferent points, for the purpose set forth.

4. The combination with a body to be reciprocated and an element, as a connectingrod, for reciprocating the same; of a carrier in the form of a frame, loosely mounted on IOO IIO

theA rod and journaled to the aforesaid body at points intermediate of its longitudinal center and that end farthest from the driven end of the rod, guide-rods secured to said frame, a cross-head secured to the connecting-rod and having free motion on the guide-rods, and

yielding resistances on said rods antagoniz.

ing the movements of the cross-head with the connecting-rod, the power exerted by said resistances varying substantially in accordance with the moments on the Vcross-head at the various points acted on by the resistances, for the purpose set forth.

5. The combination with a separator and a to and fro movable connecting-rod; of the frame F loosely mounted on said rod and having journals f journaled in bearings on and about midway of the length of the separatorsupport, guide-rods d, secured to the ends of said frame, the cross-head H secured to the connecting-rod and guided on rods d, springs, S', S', S2 thereon on opposite sides of the crosshead, and the buffers B and B2 interposed between the cross-head and the springs S' S2,

respectively, substantially as and for the purpose set forth.

6. The combination with a body to be reciprocated and an element, as a crank-driven connecting-rod, for reciprocating thevsame; of means for neutralizing shocks comprising a carrier loosely mounted on the rod and joui` naled to the aforesaid body at points interi mediate of its longitudinal center and that end farthest from the driven end of the rod, said carrier having cross-head guides, a crosshead secured to the connecting-rod and guided kby said guides, and yielding resistances acting on opposite faces of the cross-head at different points to antagonize its to and-fro movements with the connecting-rod, substantially as and for the purposes set forth.

In testimony that I claim the foregoing as my invention I have signed my name inpresence of two subscribing witnesses.

FRIEDRICH HERMANN SCHULE. Witnesses:

WM. HEINRIoHs, GUSTA/.iv Huss. 

